Senior Trading Systems Software Engineer (Python / React / FIX / Fidessa)
Role: Software Engineer
Working hours: Normal 8hrs + expectation for 07:00am start twice a week local time
Work Location: 100% on site in Central Sydney
Duration: 1 year + possible extensions
Job Purpose:
This role designs, builds, and supports the trading and analytics applications the desk depends on daily. We build our own tooling, we own it end-to-end, and we hold it to the same standard as any production trading system. You will work directly with traders and operations staff, ship real software, and apply genuine engineering discipline - including structured AI-assisted development as a first-class part of the workflow.
Key Responsibilities:
· Design, build, test, and support Python back-end services and React front-end applications covering order flow, position and risk views, trade analytics, and reporting - modelled explicitly around business domain concepts: OrderRouter, RiskGate, MarketDataFeed, Strategy, OMS.
· Maintain and extend FIX connectivity and order routing integrations across APAC venues; support Fidessa/Triton configuration, session management, and user troubleshooting.
· Design and own PostgreSQL and MSSQL schemas that accurately reflect trading domain models; write and tune queries supporting real-time and end-of-day analytics workflows; coordinate larger database work with the US team.
· Translate trader and operations requirements into clear specifications, walk stakeholders through design decisions, and communicate incident impact and resolution in plain language.
· Apply a structured TDD cycle without exception: spec sign-off, implementation plan sign-off, automated tests agreed and written before code, peer review of all output (human or LLM-generated), and continuous test execution covering functional correctness, non-functional behavior (latency, throughput, resilience), and code quality gates.
· Use Copilot and LLMs as a disciplined co-author operating inside that defined cycle-spec, sign off, implement, test, review, repeat. Unstructured vibe coding is not practiced here and will not be accepted in peer review.
Required Skills
· Experience in systems engineering for front office & operations trading technology within cash equities
· Production Python: fully typed, mypy-strict, domain-modelled, Pythonic; dataclasses, Protocols, precise exception handling.
· Production React/TypeScript: strict mode, no `any`, clean async patterns, cohesive component design.
· FIX protocol: session lifecycle, order state management, drop copy, reconciliation, venue-side troubleshooting.
· Fidessa: hands-on support and integration experience in a live trading environment.
· PostgreSQL and MSSQL: relational schema design for trading workflows, query optimization, operational support.
· Genuine TDD discipline: unit-first, deterministic fixtures, meaningful assertions, coverage on critical paths. Demonstrable in a pair session, not just on a CV.
· Structured LLM co-design practice: the candidate must be able to articulate their workflow clearly and demonstrate it live.
Preferred Skills
· Cash equities microstructure: tick sizes, lot rules, auction mechanics
CI/CD pipelines (Jenkins or GitHub Actions), structured observability (logging, metrics, tracing), Docker/Kubernetes."
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